Re: NROL-65 search elements

From: Björn Gimle (bjorn.gimle@gmail.com)
Date: Wed Aug 28 2013 - 20:23:37 UTC

  • Next message: C. Bassa: "Re: NROL-65 seen?"

    I also observed and photographed the two objects in Cygnus.
    The brighter object appulsed xi Cyg quite close in the direction of Deneb
    19:23:40.
    This is 2m 03s after the prediction from the elset below !?
    
    I obtained four pictures in Cygnus (one with only the trailer), one in
    Cephei, and witnessed a flare at about mag -4 about  5 deg below Polaris.
    
    
    
    2013/8/28 Ted Molczan <ssl3molcz@rogers.com>
    
    > Cees Bassa sent me the positions that reduced from his photos of two
    > objects from the launch of NROL-65.
    >
    > 99066 13 740A   4171 G 20130828192053736 17 25 2254497+111506 37 S
    > 99066 13 740A   4171 G 20130828192059697 17 25 2256784+121339 37 S
    > 99066 13 740A   4171 G 20130828192106706 17 25 2259528+132258 37 S
    > 99067 13 740B   4171 G 20130828192100486 17 25 2254301+113284 37 S
    > 99067 13 740B   4171 G 20130828192109706 17 25 2257760+130290 37 S
    >
    > Object 99066 was leading 99067.
    >
    > My guess is that the fainter, trailing object 13740B, is the payload, and
    > the brighter leading object is the second
    > stage of the Delta 4H.
    >
    > Here are updated elements fit to 13740B:
    >
    > 1 79502U          13240.80636574  .00019623  00000-0  18973-3 0    07
    > 2 79502  97.9398 305.0356 0517992 211.7239 199.4683 14.80970130    03
    >
    > Epoch is the time of the observation. I adjusted only RAAN and mean
    > anomaly to take out most of the time and track error
    > relative the pre-launch version of 79502. That almost certainly is an
    > over-simplification, but should suffice to obtain
    > additional observations, which will yield more accurate elements.
    >
    > I expect the second stage to have de-orbited over the Pacific roughly 25
    > min after Cees imaged it.
    >
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